Overall Green alert Tropical Cyclone for HALONG-25
in Japan

Event summary

Tropical Cyclone HALONG-25 can have a low humanitarian impact based on the maximum sustained wind speed, exposed population and vulnerability.

GDACS ID TC 1001221
Name HALONG-25
From - To 04 Oct - 09 Oct
Exposed countries Japan
Exposed population No people in Category 1 or higher
Maximum wind speed 222 km/h Category 4
Maximum storm surge 0.6 m (08 Oct 20:00 UTC)
Vulnerability Low (Japan)

GDACS Score

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Wind Storm surge Rainfall GDACS score
GDACS JTWC 222 km/h 0.6 m n.a. 0.5
Single TC: maximum expected impact (wind, storm surge, rainfall)
HWRF n.a n.a. n.a. n.a.
GFS 202 km/h 1.1 m 4616 mm 0.5
ECMWF 216 km/h 1.2 m 1332 mm 0.5
Maximum expected impact (wind, storm surge and rainfall) using different data sources.
Virtual OSOCC
Meteo assessment
Satellite products
Analytical products
Japan - Tropical cyclone HALONG (ECHO 14 Oct 2025)Thu, 09 Oct 2025 10:13

  • A new tropical cyclone named HALONG formed over the Northwest Pacific Ocean on 4 October and started moving north toward the southern coast of central Honshu island - the main island of Japan - strengthening. On 9 October at 3.00 UTC, its centre was located over the ocean, approximately 250 km south-east of the Greater Tokyo area, with maximum sustained winds of approximately 190 km/h (typhoon).
  • According to the Japanese Fire and Disaster Management Agency (FDMA), as of 9 October, national authorities issued evacuation orders for around 8,850 people across the Greater Tokyo area.
  • HALONG is expected to continue eastward over the ocean, well off the coast of eastern Honshu island on 9-10 October, weakening into a tropical storm.
  • Over the next 48 hours, moderate rainfall is forecast over the Greater Tokyo area.
Detailed event map. European Union, 2025. Map produced by EC-JRC.
The boundaries and the names shown on this map do not imply official endorsement or acceptance by the European Union.

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Estimated casualties (PAGER)

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Exposed population

Data, images, links, services and documents

For this events, GDACS has links to information from the following sources: EC-JRC (40), (2), WMO (1), INFORM (2),